Building basement bottom plate water seepage treatment anti-seepage structure
By using multi-layer sealing treatment of hydrophilic polyurethane, acrylate and polyurea waterproof coatings in the basement floor, the problem of leakage between the basement floor and the soil was solved, and a stable waterproof effect was achieved.
Patent Information
- Application Number
- CN202422675419.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-01
AI Technical Summary
Existing technologies cannot effectively solve the problem of leakage between the basement floor and the soil when the shield tunnel passes under an existing building. In particular, for wider, deeper or extended cracks, surface treatment methods cannot fundamentally fill and reinforce them.
Existing grouting pipes are used to inject hydrophilic polyurethane, acrylate and polyurea waterproof coatings. Through low-pressure grouting, vacuuming and sealing treatment, the gaps are filled and a gel is formed. Combined with V-grooves and crack grouting nozzles, multi-layer sealing is achieved.
Effectively fill the gaps between the basement floor and the soil, cut off the path for groundwater to rise, keep the floor dry, and improve the anti-seepage stability and overall strength of the floor.
Smart Images
Figure CN223317247U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of anti-seepage structures, and in particular to an anti-seepage structure for treating water seepage in building basement floors. Background Art
[0002] When shield tunnels pass under existing buildings, grouting is performed to reinforce the soil beneath them for safety reasons, increasing their bearing capacity. However, after the shield tunnel passes through and is re-extended, the soil is disturbed, creating gaps between the soil and the basement floor. Groundwater can flow in through these gaps or seep onto the surface, causing waterlogging and dampness in the basement floor.
[0003] Existing methods often focus solely on surface treatment, which works well for smaller, shallower cracks. However, for wider, deeper, or extended cracks, these methods fail to fundamentally address leakage and fail to penetrate deep into the cracks for filling and reinforcement. Therefore, a new technical solution is needed to address these issues. Utility Model Content
[0004] In order to facilitate the treatment of floor seepage, the present application provides an anti-seepage structure for treating floor seepage in a building basement.
[0005] This application provides a water seepage treatment and anti-seepage structure for basement floor of a building, which adopts the following technical solutions:
[0006] A water seepage treatment and anti-seepage structure for the floor slab of a building basement comprises a ground body with an existing grouting pipe, the ground body comprising a floor slab and a decorative surface layer, the decorative surface layer being arranged on the top surface of the floor slab, the top surface of the decorative surface layer being provided with a first chiseled opening, the top surface of the floor slab being provided with a second chiseled opening, a water-absorbing grouting nozzle for injecting hydrophilic polyurethane and a primary plugging grouting nozzle for injecting acrylate being pre-buried around the existing grouting pipe, an open-hole grouting pipe being further arranged around the existing grouting pipe, the second chiseled opening being provided with a plugging material, a vacuum arrangement being provided inside the open-hole grouting pipe, and a polyurea waterproof coating being injected into the open-hole grouting pipe.
[0007] By adopting the above technical solution, low-pressure grouting is first performed into the existing grouting pipe until the grout overflows from the pipe mouth, which is beneficial for filling the pores between the basement floor and the soil, treating the depletion of the basement floor due to the disturbance of the lower soil, and at the same time cutting off the path of groundwater upwelling. Secondly, hydrophilic polyurethane is used to absorb residual moisture in the reinforced concrete of the basement floor, keeping it as dry as possible. Since acrylic acid can quickly dissolve in water to form a gel, acrylic acid is used to fill the cracks in the basement floor for the first time. The wall of the perforated grouting pipe has many regularly arranged small holes, which facilitate the uniform outflow of grouting liquid into the concrete medium to be sealed. Polyurea waterproof coating is injected into the perforated grouting pipe to further fill the gaps in the basement floor, performing a secondary sealing. Vacuuming the perforated grouting pipe helps eliminate air interference and facilitates the polyurea waterproof coating to fully fill the surrounding concrete cracks. Such construction is beneficial for improving the stability of the basement floor water seepage treatment.
[0008] Optionally, the base plate is embedded with a crack grouting nozzle for sealing cracks.
[0009] By adopting the above technical solution, polyurea waterproof coating is also injected into the cracks through the crack grouting nozzle, which is beneficial to sealing the small cracks around the base plate and improving the stability of the overall water seepage treatment of the base plate.
[0010] Optionally, a V-shaped groove is provided on the top surface of the base plate, the V-shaped groove is connected to the crack, and the crack grouting nozzle is pre-buried in the crack at 45°.
[0011] By adopting the above technical solution, the filling status of the polyurea waterproof coating can be easily observed through the V-shaped groove. After the cracks around the existing grouting pipes are filled, it is beneficial to improve the overall water-proof property of the base plate.
[0012] Optionally, portions of the existing grouting pipe, the water-absorbing grouting nozzle, the primary plugging grouting nozzle, and the crack grouting nozzle protruding from the bottom plate are all cut off.
[0013] By adopting the above technical solution, by cutting off the parts of the existing grouting pipe, water absorption grouting nozzle, primary sealing grouting nozzle and crack grouting nozzle protruding from the bottom plate, it is beneficial to improve the stability of the subsequent first chiseled opening construction restoration.
[0014] Optionally, the bottom plate is coated with beneficial putty based on the top surface of the first chiseled opening.
[0015] By adopting the above technical solution, the beneficial glue has the characteristics of high bonding strength, which is beneficial to the stability of the subsequent bonding between the new concrete and the base plate.
[0016] Optionally, the first chiseled opening is tied with reinforcement bars and hooked steel bars, and the first chiseled opening is poured with concrete.
[0017] By adopting the above technical solution, the ribs are helpful to improve the strength of the base plate, and the hooked steel bars help to achieve the joint force of the superimposed layer and the original base plate, which can better maintain the integrity of the base plate under the action of load.
[0018] Optionally, at least two water suction grouting nozzles are provided, and at least two of the water suction grouting nozzles are distributed in a circular array along the existing grouting pipe, and at least two of the water suction grouting nozzles are pre-buried to 3 / 4 of the thickness of the bottom plate.
[0019] By adopting the above technical solution, the hydrophilic polyurethane has good hydrophilicity. By pre-embedding to 3 / 4 of the thickness of the base plate, it is beneficial to ensure that the hydrophilic polyurethane fully absorbs the residual moisture in the reinforced concrete of the basement basement basement basement, so as to keep it as dry as possible.
[0020] Optionally, at least two primary plugging grouting nozzles are provided, and at least two of the primary plugging grouting nozzles are distributed in a circular array along the existing grouting pipe. The distance between the at least two primary plugging grouting nozzles and the existing grouting pipe is 10-15 cm, and at least two of the primary plugging grouting nozzles are pre-buried at 45° to 1 / 2 of the thickness of the bottom plate.
[0021] By adopting the above technical solution, acrylate penetrates into the gaps of the hydrophilic polyurethane that has absorbed water and solidifies quickly to form a waterproof sealing colloid, thereby further preventing accumulated water from seeping out of the base plate and completing the sealing of the base plate for the first time.
[0022] In summary, this application has the following beneficial technical effects:
[0023] First, low-pressure grouting is carried out into the existing grouting pipes until the slurry overflows from the pipe mouth, which is beneficial to filling the pores between the basement floor and the soil, treating the voids in the basement floor caused by the disturbance of the lower soil, and cutting off the path for groundwater to rise. Secondly, hydrophilic polyurethane is used to absorb the residual moisture in the reinforced concrete of the basement floor to keep it as dry as possible. Since acrylic acid can quickly dissolve in water to form a gel, acrylic acid is used for the initial sealing to fill the cracks in the basement floor. Such construction is beneficial to improving the stability of the floor seepage treatment. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a schematic plan view of the ground body with existing grouting pipes in the present application;
[0025] Figure 2 It is a plan view of the first and second excavation openings of the ground body excavated in the present application;
[0026] Figure 3 It is a plan view of the bottom plate embedded water absorption grouting nozzle, the primary plugging grouting nozzle and the crack grouting nozzle of the present application;
[0027] Figure 4 It is a plan view of sealing the second chiseled opening and cracks of the present application;
[0028] Figure 5 It is a plan view of the pressed and applied cement of the present application;
[0029] Figure 6 It is a plan view of the tied reinforcement and hooked steel bars of this application.
[0030] Explanation of the accompanying symbols: 1. Ground; 2. Decorative surface layer; 3. Base plate; 4. First chiseled opening; 5. Second chiseled opening; 6. Water-absorbing grouting nozzle; 7. Initial sealing grouting nozzle; 8. Open-hole grouting pipe; 9. Sealing material; 10. Crack; 11. V-shaped groove; 12. Crack grouting nozzle; 13. Glue; 14. Gluten; 15. Hooked steel bar; 16. Existing grouting pipe. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-6 This application is described in further detail.
[0032] See also Figure 1-6 , a water seepage prevention structure for treating the floor slab of a building basement, comprising a ground body 1, and an existing grouting pipe 16 exists in the ground body 1. The ground body 1 comprises a decorative surface layer 2 and a base plate 3, and the decorative surface layer 2 is fixedly installed on the top surface of the base plate 3. A first chiseled opening 4 is provided on the top surface of the decorative surface layer 2, and the range of the first chiseled opening 4 is 1000mm*1000mm. A second chiseled opening 5 is provided on the top surface of the base plate 3, and the range of the second chiseled opening 5 is Φ300*30mm, and it is conical in shape. A water-absorbing grouting nozzle 6 and a primary plugging grouting nozzle 7 are pre-buried around the existing grouting pipe 16, wherein the water-absorbing grouting nozzle 6 is used to inject hydrophilic polyurethane, and the primary plugging grouting nozzle 7 is used to inject acrylate.
[0033] The periphery of the existing grouting pipe 16 is also arranged with a perforated grouting pipe 8, and the second chiseled opening 5 is filled with a plugging material 9, specifically a plugging material 9. The perforated grouting pipe 8 is vacuumed and a polyurea waterproof coating is injected into the perforated grouting pipe 8.
[0034] When sealing the seepage cracks 10 around the existing grouting pipe 16 in the ground body 1, the existing grouting pipe 16 is first located. The decorative surface layer 2 is then chiseled away, centered around the existing grouting pipe 16, over an area of 1000 mm by 1000 mm, until the base plate 3 is exposed. The base plate 3 is then chiseled away again, centered around the existing grouting pipe 16, creating a conical area measuring 300 mm by 30 mm. The appropriate grouting method is selected by observing the water inflow rate from the second chiseled opening 5. In this embodiment, low-pressure grouting is employed.
[0035] First, low-pressure grouting is performed into the existing grouting pipe 16 until the slurry overflows from the pipe mouth. This is to fully fill the gap between the basement floor 3 and the soil, to deal with the voids in the basement floor 3 caused by the disturbance of the lower soil, and to cut off the path for groundwater to rise. Secondly, hydrophilic polyurethane is used to absorb the residual moisture in the reinforced concrete of the basement floor 3 to keep it as dry as possible. Since acrylate can quickly dissolve in water to form a gel, acrylate is then used to initially seal and fill the cracks 10 in the basement floor 3.
[0036] Since the wall of the perforated grouting pipe 8 has many regularly arranged small holes, these holes facilitate the uniform outflow of the grouting liquid into the concrete medium that needs to be sealed. Injecting polyurea waterproof coating into the perforated grouting pipe 8 further fills the gaps in the basement floor slab 3, thus providing a secondary seal. Vacuuming the perforated grouting pipe 8 helps eliminate air interference and facilitates the polyurea waterproof coating to fully fill the surrounding concrete cracks 10. This completes the water seepage treatment of the floor slab 3.
[0037] See also Figure 3 Water seepage in the bottom plate 3 is often accompanied by cracks 10. For this purpose, a crack grouting nozzle 10 for sealing the cracks 10 is embedded in the bottom plate 3. A V-shaped groove 11 is opened on the top surface of the bottom plate 3. The specification of the V-shaped groove 11 is 50mm*50mm. The V-shaped groove 11 is connected to the seam of the crack 10. The crack grouting nozzle 10 is pre-buried at 45 degrees to the crack 10.
[0038] Polyurea waterproof coating is also injected into the cracks 10 through the crack grouting nozzle 10, which helps to seal the small cracks 10 around the bottom plate 3. The V-shaped groove 11 makes it easy to observe the injection status of the polyurea waterproof coating. After the cracks 10 around the existing grouting pipe 16 are grouted, the overall waterproofing of the bottom plate 3 is improved.
[0039] It should be noted that after the crack 10 is sealed, epoxy repair glue is used to cover the crack, and the covering range is 100 mm around the crack grouting nozzle 10.
[0040] See also Figure 4The existing grouting pipe 16, the water grouting nozzle 6, the initial plugging grouting nozzle 7 and the crack grouting nozzle 10 protruding from the bottom plate 3 are all cut off. This is beneficial to improving the stability of the subsequent construction and restoration of the first chiseled opening 4.
[0041] See also Figure 5 , the top surface of the bottom plate 3 is pressed with beneficial mortar 13. The beneficial mortar 13 has the characteristics of high adhesion, which is beneficial to the stability of the subsequent bonding of new concrete and bottom plate 3.
[0042] See also Figure 6 The first cutout 4 is tied with surface reinforcement 14 and hooked steel bars 15. The surface reinforcement 14 is a single layer, bidirectional, and is made of Grade 3 steel bars 12@150 mm. The hooked steel bars 15 are bent 180 degrees and are made of Grade 3 steel bars 8@400*400 mm. They are arranged in a plum blossom pattern, with one end of the hooked steel bar 15 embedded in the base plate 3 to a depth of 15d. The other end of the hooked steel bar 15 is tied to the surface reinforcement 14. Concrete is also poured into the first cutout 4.
[0043] The ribs 14 are beneficial to improving the strength of the bottom plate 3, and the hooked steel bars 15 help to achieve the joint stress bearing of the superimposed layer and the original bottom plate 3, thereby better maintaining the integrity of the bottom plate 3 under the action of load.
[0044] It is worth mentioning that see Figure 3 The number of water suction grouting nozzles 6 is at least two, and the at least two water suction grouting nozzles 6 are distributed in a circular array along the existing grouting pipe 16 as the axis. The at least two water suction grouting nozzles 6 are pre-buried to 3 / 4 of the thickness of the bottom plate 3, and the water suction grouting nozzles 6 are paused for 10-15 seconds after the first injection before performing the second injection.
[0045] Hydrophilic polyurethane has good hydrophilicity. The number of water-absorbing grouting nozzles 6 is selected according to the moisture content or wetness of the base plate 3, which is conducive to reducing the moisture content inside the base plate 3 and keeping the base plate 3 dry. By pre-embedding to 3 / 4 of the thickness of the base plate 3, it is conducive to ensuring that the hydrophilic polyurethane fully absorbs the residual moisture in the reinforced concrete of the basement ...
[0046] In addition, at least two primary sealing grouting nozzles 7 are provided, and at least two primary sealing grouting nozzles 7 are distributed in a circular array along the existing grouting pipe 16. The distance between the at least two primary sealing grouting nozzles 7 and the existing grouting pipe 16 is 10-15 cm, and at least two primary sealing grouting nozzles 7 are pre-buried at 45° to 1 / 2 of the thickness of the bottom plate 3.
[0047] Selecting the number of initial plugging grouting nozzles 7 based on the cracking conditions of the base plate 3 around the existing grouting pipes 16 is beneficial for improving the efficiency of the initial plugging of the base plate 3. Acrylate penetrates into the gaps in the hydrophilic polyurethane that has absorbed water and quickly solidifies to form a waterproof sealant, thereby further preventing accumulated water from seeping onto the base plate 3 and completing the initial plugging of the base plate 3.
[0048] Working principle of a building basement floor seepage treatment and anti-seepage structure:
[0049] When sealing the seepage cracks 10 around the existing grouting pipe 16 in the ground body 1, the existing grouting pipe 16 is first located. The decorative surface layer 2 is then chiseled away, centered around the existing grouting pipe 16, over an area of 1000 mm by 1000 mm, until the base plate 3 is exposed. The base plate 3 is then chiseled away again, centered around the existing grouting pipe 16, creating a conical area measuring 300 mm by 30 mm. The appropriate grouting method is selected by observing the water inflow rate from the second chiseled opening 5. In this embodiment, low-pressure grouting is employed.
[0050] First, low-pressure grouting is performed into the existing grouting pipe 16 until the slurry overflows from the pipe mouth. This is to fully fill the gap between the basement floor 3 and the soil, to deal with the voids in the basement floor 3 caused by the disturbance of the lower soil, and to cut off the path for groundwater to rise. Secondly, hydrophilic polyurethane is used to absorb the residual moisture in the reinforced concrete of the basement floor 3 to keep it as dry as possible. Since acrylate can quickly dissolve in water to form a gel, acrylate is then used to initially seal and fill the cracks 10 in the basement floor 3.
[0051] Then, a perforated grouting pipe 8 is arranged around the existing grouting pipe 16, and then the second chiseling opening 5 is blocked using a blocking material 9. After blocking, the perforated grouting pipe 8 is vacuumed and then injected with a polyurea waterproof coating.
[0052] Then, the cracks 10 around the bottom plate 3 are sealed with the crack grouting nozzle 10, and then the epoxy repair glue is applied to the cover. After the cracks 10 are repaired, the existing grouting pipe 16, the water grouting nozzle 6, the initial plugging grouting nozzle 7 and the portion of the crack grouting nozzle 10 protruding from the bottom plate 3 are cut off, and then the top surface of the bottom plate 3 is pressed and smeared with the adhesive 13.
[0053] Then, the reinforcement bars 14 and the hook reinforcement bars 15 are tied in sequence in the first chiseled opening 4, and after tying, concrete is poured into the first chiseled opening 4 until the decorative surface layer 2 is restored, thereby completing the water seepage treatment and restoration of the basement floor 3.
[0054] To sum up, the use of hydrophilic polyurethane is used to solve the problem of moisture and water seepage in the base plate 3, the use of acrylate is used for primary sealing to solve the problem of water seepage in the concrete cracks 10 around the existing grouting pipes 16 in the base plate 3, and the use of polyurea waterproof coating for secondary sealing can further enhance the waterproof sealing of the base plate 3, which is conducive to improving the stability of handling the water seepage of the base plate 3.
[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A water seepage treatment and anti-seepage structure for a building basement floor, comprising a ground body (1) having an existing grouting pipe (16), characterized in that: The ground body (1) comprises a base plate (3) and a decorative surface layer (2), wherein the decorative surface layer (2) is arranged on the top surface of the base plate (3), a first chiseled opening (4) is provided on the top surface of the decorative surface layer (2), and a second chiseled opening (5) is provided on the top surface of the base plate (3). A water-absorbing grouting nozzle (6) for injecting hydrophilic polyurethane and a primary plugging grouting nozzle (7) for injecting acrylate are pre-buried around the existing grouting pipe (16), an open hole grouting pipe (8) is further arranged around the existing grouting pipe (16), a plugging material (9) is provided at the second chiseled opening (5), a vacuum is provided inside the open hole grouting pipe (8), and polyurea waterproof coating is injected into the open hole grouting pipe (8).
2. The anti-seepage structure for treating water seepage in a building basement floor according to claim 1, characterized in that: The bottom plate (3) is embedded with a crack grouting nozzle (12) for sealing the crack (10).
3. The anti-seepage structure for treating water seepage in a building basement floor according to claim 2, characterized in that: A V-shaped groove (11) is provided on the top surface of the bottom plate (3), the V-shaped groove (11) is connected to the crack (10), and the crack grouting nozzle (12) is pre-buried in the crack (10) at an angle of 45°.
4. The anti-seepage structure for treating water seepage in a building basement floor according to claim 2, characterized in that: Portions of the existing grouting pipe (16), the water-absorbing grouting nozzle (6), the primary plugging grouting nozzle (7), and the crack grouting nozzle (12) protruding from the bottom plate (3) are all cut off.
5. The anti-seepage structure for treating water seepage in a building basement floor according to claim 1, characterized in that: The bottom plate (3) is provided with beneficial glue (13) by pressing and smearing on the top surface of the first chiseled opening (4).
6. The anti-seepage structure for treating water seepage in a building basement floor according to claim 1, characterized in that: The first chiseled opening (4) is tied with reinforcement bars (14) and hooked reinforcement bars (15), and concrete is poured into the first chiseled opening (4).
7. The anti-seepage structure for treating water seepage in a building basement floor according to claim 1, characterized in that: At least two water suction grouting nozzles (6) are provided, and the at least two water suction grouting nozzles (6) are respectively distributed in a ring array along the existing grouting pipe (16), and the at least two water suction grouting nozzles (6) are respectively pre-buried to 3 / 4 of the thickness of the bottom plate (3).
8. The anti-seepage structure for treating water seepage in a building basement floor according to claim 1, characterized in that: At least two of the primary plugging grouting nozzles (7) are provided, and the at least two primary plugging grouting nozzles (7) are respectively distributed in a ring array along the existing grouting pipe (16), and the distance between the at least two primary plugging grouting nozzles (7) and the existing grouting pipe (16) is 10-15 cm, and the at least two primary plugging grouting nozzles (7) are pre-buried at 1 / 2 of the thickness of the base plate (3) along a 45° angle.